Translation of "Wasting" in Chinese

Why are we wasting time with this?

为什么我们在这上面浪费时间？

Tom thought Mary was wasting her time.

Tom认为，Mary在浪费自己的时间。

She thought that he was wasting electricity.

她認為他是在浪費電。

Wasting less food isn’t just going to happen overnight.

食物浪费不是一夜之间发生的

Why are you wasting time? Hurry up and go.

你磨蹭什么呀，快点去吧。